Open AccessExperimental Evaluation of the Average Energy for Impact Ionization by Holes in Al0.4Ga 0.6N Alloy
Author(s) -
Haifeng Chen,
Yiren Chen,
Hang Song,
Zhiming Li,
Hong Jiang,
Dabing Li,
Guoqing Miao,
Xiaojuan Sun,
Zhiwei Zhang
Publication year - 2017
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2017.2682104
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
An experimental approach to evaluate the average energy required by holes for impact ionization in Al0.4 Ga0.6N alloys is presented. A series of back-illuminated separate absorption and multiplication structures with different thickness of multiplication layer are employed. With the measured quantum efficiency of devices and a consideration of energy conservation in ionization process, the average energy for electron-hole pair production by energetic holes is obtained and it qualitatively agrees with the bond energy of Al0.4Ga0.6N, which is estimated from the Vegard's law.